Need NGG Power Driver Board j103 Voltage Measurement

(Topic ID: 219172)

Need NGG Power Driver Board j103 Voltage Measurement

By MrSanRamon

7 months ago

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  • 11 posts
  • 2 Pinsiders participating
  • Latest reply 7 months ago by zaza
  • No one calls this topic a favorite


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6point8 (resized).png

#1 7 months ago

There are a couple issues with my GI wiring to both the PF and the backglass (insert)...and I don't know of a nearby NGG to go check.

In checking the wiring diagrams in the manual there are some inconsistencies with referencing j105 & j106.

Additionally, my game is wired differently at j125 & j126 than is shown in the manual.

If someone can take a picture of the j105 & j106 connectors and j125 & j126 connectors and post them, I'd very much appreciate it.

Also, the manual calls out 6.8 vac on j103 pins 1-8 & 10-12 (9 is the key). I measure about 3.4 vac on pins 1, 7, 8 & 10-12; with about 7.3 vac on pins 2-6.

If someone could measure and confirm what is correct, I'd much appreciate that too.



#3 7 months ago

Thanks for the input.

If you look at the NGG manual, page shows j106 pins 5, 6, 10 & 11 not used (which is not what is shown on the link); but page 3-30 also shows j105 pins 3,5, 6, 9, 10 & 11 as GI for the insert panel.

That's just one of the inconsistencies that I found, so that's why I need pics of j105, 106, 124 & 125...and the voltage measurements on j103.


#4 7 months ago

J124/125/126 are parallel connected and therefore interchangeable.

The same for J105/106.
Only difference I see is that the harness to the translite has also an YELLOW string ( =pos.3 + 9 on same connector with VIO + GRN)

Does that clarify the inconsistencies ?

#5 7 months ago
Quoted from zaza:

Does that clarify the inconsistencies

Yes, got it.

Still need voltage readings on j103.


#6 7 months ago

Still need voltage readings on j103.


#7 7 months ago

6point8 (resized).png

#8 7 months ago

OK, thanks.

The manual page 3-30 shows + 6.8vac on all pins, you show 2-6 as +6.8 and 1, 7-12 as the returns...with 9 as the key.

Thanks for the clarification, I indeed do measure ground on pins 1, 7-12. I'll edit my manual to show those pins as returns.

Now I need to sort out why I only have voltage to j105-10 (no voltage to pins 9 & 11) and no ground on j105-3 (open), pins 5 & 6 have ground.


#9 7 months ago

Pinwiki has some nice pictures with path from J103 to J105

Quoted from MrSanRamon:

no voltage to pins 9

more specific the yellow string:

When J103 / 104 / 105 / 106 are unplugged, it is easy to measure continuity from J103-4 to F112 to J105-9

#10 7 months ago

Thanks the game is up and running fine now.

One of the fuse Clips wasn't making good contact and one of the diodes had a cracked solder joint so when I took care of those two items power and ground is good.

Thanks again for the help I appreciate it.


#11 7 months ago

My pleasure !

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